Swage



Dec. 11, 1934. w, SCHWD 1,984,234

SWAGE Filed Dec* 15,'1932 2 Sheets-Sheet 1 mun- W, SCHMID Dec. 1l, 1934.

SWAGE Filed Dec. 15, 1932 2 Sheets-Sheet 2 lll/lill ZUz'ZZ/am 565ml@ A @uw HMM-@S Patented Dec. 11,1934

PATENT OFFICE SWAGE William Schmid, Bronson, Mich., assigner to Harry A. Douglas, Bronson, Mich.`

Application December 15, 1932, Serial No. 647,416

7Claims.

This invention relates to swages. Among other objects the invention aims to provide an improved swage embodying automatic means for limiting the pressure exertable upon the article to be swaged.

Figure 2 is a section taken on the line 2-2 ofV Figure 1;

Figure 3 is a view similar to Figure 1 but showing the parts in diiferent operative position;

Figure 4 is a section taken on the line 4-4 of Figure 3;

Figure 5 is a section taken on the line 5-5 of Figure 3, parts being omitted; and

Figure 6 is a perspective view of the integral mounting ring and jaws included in my invention. A

Referring in detail to the construction shown in the drawings, the illustrative tool includes an operating head 1 and operating levers 2 and 3 which are here shown for a portion of their length only, it being understood that these levers may be suitably extended to provide handles which may be conveniently gripped by one hand of the operator and to be squeezed together to actuate the operating head as presently described.

The operating head 1 desirably includes a plurality of jaws 4, in this case four which as best shown in Figure 6 are formed integral with a mounting member such as the metallic ring 5, the jaws 4 being formed as inwardly and radially extended terminations of the integral spring ngers 6 which extend axially of the ring 5. To enhance the resiliency of the lingers 6 their point of attachment to the ring 5 may be reduced as at 7. The jaws 4 form each a quarter sector of a circle described jointly by the peripheries of the lingers 6 and the pointed inner routing out the metal of the jaw on each side of the end 8 as at 8a. Thus the inner ends 8 of the jaws are directed toward, and, in the movement of the jaws later described, tend to converge at, a common axis which is also the common axis for the lingers 6 and the mounting ring 5. Also the jaws as presently described are movable in a common plane which plane is perpendicular to said axis.

To eiect the movement of the jaws referred to, the spring lingers 6 are provided with cam surfaces 10 tapering toward their free terminations and adjacent the jaws 4.

The mounting ring 5 with the fingers 6 integral therewith is here shown received in a cylindrical housing 11 having an end wall 12 and a circular aperture 13 in this end wall through which the tapered terminations of the fingers 6 are adapted to pass. The margins of the circular aperture 13 are desirably also tapered as at 14 to conform somewhat to the tapered surfaces 10 of the fingers and to ride upon these surfaces in engagement therewith as the terminations of the fingers are forced through the aperture 13 to move the jaws 4 together centripetally as presently described.

To effect relative movement of the fingers 6 and the housing 11 just referred to, the mounting ring 5, in this instance, receives therethrough a spring barrel 15 which has an annularly flanged outer end 16 axially abutting the mounting ring 5, upon its side opposite the aperture 13,- through the intermediation of a metallic washer 11. To prevent rotation of the washer 17 and spring barrel 15 with respect to the housing 11 the housing is desirably slotted at diametrically opposite sides as at 18. Ears 19 and 20, respectively, on the washer l'l and iiange 16 of the spring barrel are also diametrically oppositely located to be received in the slots 18 which are elongated transversely of the housing to permit the parts to move axially therein as described. The slots 18 also merge into the open end 21 of the housing, so that the mounting ring with its integral ngers, the washer 17 and the spring barrel 15 may be readily inserted through this open end with the ears located in the slots.

The levers 2 and 3 are pivoted to the housing 11 as at 22 and 23, respectively, the housing at this point being desirably radially enlarged as at 24, in two spaced apart somewhat semi-circular segments 24, 24a to provide bearings for the levers 2 and 3 and to accommodate the pins 25 upon which the levers are pivoted, these pins being passed through countersunk recesses 26 in the segment 24 and being threadedly received as at 27 in threaded passages in the segment 24a. Thus the pins 25 are advantageously protected by the peripheries of the segments 24 and 24a. In addition to being diametrically oppositely pivotally connected to the housing 11, as described, the levers 2 and 3 have inwardly directed extensions 28, 28a, respectively, which are fulcrumed in the spring barrel 15. In this instance, these extensions 28, 28a are fulcrumed on a plate 29 which is housed within the spring barrel 15, the plate 29 being somewhat larger than the main body of the spring barrel, but being received in the hollow annular flange 16 thereof. The relative proportions of the ange 16 and plate 29 are such that the plate may have restricted movement axially of the spring barrel which movement is opposed by a relatively heavy coil spring 30 also housed within the spring barrel 15. Thus when the levers 2 and 3 are squeezed together from the position shown in Figure 1 to the position shown in Figure 3, the levers being fulcrumed by their extensions upon the plate 29 and being pivoted to the housing 11 tend to move the housing and plate relatively in an axial direction. Until the spring 30 yields, the plate 29 being at this time xed with respect to the spring barrel 15 moves with the spring barrel itself, and, through the intermediation of .the spring barrel, moves the mounting ring 5. Relative axial movement of the mounting ring 5 and housing 11 thus eected forces the tapered terminations of the spring ngers through the aperture 13 and forces the jaws 4 together, the extent of movement of the jaws centripetally being determined by the relative longitudinal `movement of the tapered surfaces 10 and 14.

' upon the terminal 31 to that necessary to form the above described coupling, I desirably provide yieldable means for limiting further movement of the mounting ring 5 within the housing 11. As best shown in Figure 3 when a predetermined pressure proportional to the resistance encountered by the jaws has been placed upon the terminal 31, the spring 30 yields and the plate 29 acts as a plunger which follows the spring and permits the fulcrum point of the extensions 28, 28a to move. This stops relative movement of the housing 11 and mounting ring 5, which, in turn, stops further movement of the jaws 4 inwardly, provided the plate 29 has not traveled the full extent of its possible axial movement with respect to the spring barrel 15. I provide means for regulating the movement of the plate 29 to suit the pressure desired to be exerted by the jaws 4 and for this purpose, I make the inner end of the spring barrel 15 in the form of outer end slotted as at 37 to be turned by a screw-driver and the extensions 28, 28a of the Lee-1,234

levers 2 and 3 may be offset upon each side of this shank as best shown in Figure 2.

When the levers have been moved together to move the parts of the operating head to the position shown in Figure 3 and the levers are released, the resiliency of the tlngers 6 moves the housing 11 and the mounting ring 5 in the opposite direction to restore the parts to the position shown in Figure 1. To limit movement of the levers 2 and 3 apart they may be provided with stops 38 and 39, respectively, which abut the housing 11 in the separated position of the levers as shown in Figure 1.

To limit extent of insertion of the terminal 31 between the Jaws 4, I provide a gauge 40 which may be of cylindrical form and may be slipped over the housing 11. The ears 19 of the washer 17 may be extended beyond the housing 11 to engage an annular slot 41 in the gauge 40, this slot meeting diametrically opposite transverse slots 42 which merge into the slot 41 and open into the outer end of the gauge, so that the ears 19 may be passed through the diametrically opposite slots 42 and then by a rotation of the gauge be received in the slot 41 to secure lthe gauge slidably to the housing 11, the gauge sliding on the housing 11 in response to movement of the mounting ring 5 and spring barrel 15. The gauge may have an end wall 42a apertured as at 43 concentrically with the commonaxis of the parts and this aperture may be tapered to correspond with the taper of the terminal 31 and thus limit insertion of the tapered terminal into the aperture 43 to a point where the terminal 31 is in engagement with the jaws 4 near its extremity as shown in Figures 1 and.3.`

Having described an embodiment of my inven tion, I claim:

1. In a swage, the combination of a plurality of jaws arranged about a common center-and radially reciprocable; resilient supports lforisaid jaws; cam surfaces on said supports; a mounting for said supports; a member movable rela, tively to said supports and mounting and engageable with said surfaces to move said jaws, said jaws moving radially inwardly against the resiliency of the supports upon movement of the member in one direction and movingradially outwardly upon movement of the member in the opposite direction; means for moving the member and yielding means interposed between the movable member and the moving means therefor operative upon the jaws encountering a predetermined resistance. v Y

2. In a swage, the combination of a metallic mounting ring; a plurality of spring iingers extending axially of said ring, the terminations of said ngers being turned toward the axis of the ring to provide radially movable jaws and said fingers having surfaces tapering toward said terminations; a cylindrical housing for said ring having an apertured wall at one end, said aperture receiving the ngers therethrough and said wall being engageable with the tapered surfaces; means for causing relative movement of the ring and housing to force the fingers through said aperture to cause the housing to contract the fingers and move the jaws together and yielding means interposed between the moving means and ring actuated upon the Jaws encountering a predetermined resistance to prevent further relative movement thereafter of the ring and housing' 3. In a swage, the combination of a metallic mounting ring; a plurality of spring fingers ex- 1,9`e4,2s4 tending axially of said ring, the terminations of.

said lingers being turned toward the axis of ,the ring to provide radially movable jaws and said fingers having surfaces tapering toward said terminations; a cylindrical housing for said ring having an apertured wall at one end, said aperture receiving the lingers therethrough and said wall being engageable with the tapered surfaces; means for causing relative movement of the ring and housing to forcev the ngers through said aperture to cause the housing to contract the ngers and move the jaws together and yielding means interposed between the moving means and ring actuated upon the jaws encountering a predetermined resistance to prevent further relative movement thereafter of the ring and housing.

4. In a swage, the combination of a metallic mounting ring; four integral spring lingers extending axially of said ring, the terminations of -said iingers being turned toward the axis of the ring to provide radially movable jaws in a substantially common plane and said ilngers adjacent the terminations having surfaces'tapering toward said terminations;y a cylindrical housing for said ring receiving said ring, said housing having an apertured wall at its end adjacent the terminations, said aperture receiving the terminations therethrough and said wall engaging the said tapered surfaces. said aperture being circular and the peripheries of said fingers jointly describing a circle; a spring barrel received between said lingers in abutment with said ring uponits side opposite said aperture; a plunger having limited movement in said barrel; a spring in said barrel pressing said plunger outwardly thereof; and a pair of levers pivoted on said housing and fulcrumed on said plunger.

5. The structure of claim 4 wherein the end of the spring barrel opposite the plunger is adjustable to control the pressure of the spring on the plunger.

6. The structure of claim 4 wherein a washer is interposed between the ring and the barrel and said washer and barrel carry diametrlcally opposite aligned projections and said housing is slotted to permit said projections to move therein.

'1. The structure of claim 4 wherein a cylindrical gauge member is passed over said housing and secured thereto, said gauge member having a wall adjacent the end wall of the housing and a hole therein concentric with the common axis of the jaws.

. WILLIAM SCHMID. 

